Reducing audio noise in a lidar scanner with a polygon mirror
First Claim
1. An optical scanner comprising:
- a rotatable polygon mirror including;
a block having a first wall, a second wall, and a plurality of reflective surfaces extending between the first and second walls, the reflective surfaces being angularly offset from one another along a periphery of the block,a polygon mirror axle extending into the block through at least one of the first and second walls, about which the block rotates,a motor driving rotation of the block, anda plurality of chamfered corners in the block, each of the chamfered corners being bounded by a pair of adjacent reflective surfaces and the second wall, and not bounded by the first wall; and
a second mirror pivotable along an axis orthogonal to the polygon mirror axle and more proximate to the second wall of the block than the first wall of the block.
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Accused Products
Abstract
An optical scanner includes a rotatable polygon mirror and a second mirror. The rotatable polygon mirrors includes a block having a first wall, a second wall, and reflective surfaces extending between the first and second walls, the reflective surfaces being angularly offset from one another along a periphery of the block; a polygon mirror axle extending into the block through at least one of the first and second walls, about which the block rotates; a motor driving rotation of the block; and chamfers in the block, each of the chamfers being bounded by a pair of adjacent reflective surfaces and the second wall. The second mirror is pivotable along an axis orthogonal to the polygon mirror axle and more proximate to the second wall of the block than the first wall of the block.
255 Citations
20 Claims
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1. An optical scanner comprising:
a rotatable polygon mirror including; a block having a first wall, a second wall, and a plurality of reflective surfaces extending between the first and second walls, the reflective surfaces being angularly offset from one another along a periphery of the block, a polygon mirror axle extending into the block through at least one of the first and second walls, about which the block rotates, a motor driving rotation of the block, and a plurality of chamfered corners in the block, each of the chamfered corners being bounded by a pair of adjacent reflective surfaces and the second wall, and not bounded by the first wall; and a second mirror pivotable along an axis orthogonal to the polygon mirror axle and more proximate to the second wall of the block than the first wall of the block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A lidar system comprising:
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a light source configured to emit light; a receiver configured to detect the light scattered by one or more remote targets; and an optical scanner including; a rotatable polygon mirror comprising; a block having a first wall, a second wall, and a plurality of reflective surfaces extending between the first and second walls, the reflective surfaces being angularly offset from one another along a periphery of the block, a polygon mirror axle extending into the block through at least one of the first and second walls, about which the block rotates, a motor driving rotation of the block, and a plurality of chamfered corners in the block, each of the chamfered corners being bounded by a pair of adjacent reflective surfaces and the second wall, and not bounded by the first wall, the optical scanner further including; a second mirror pivotable along an axis orthogonal to the polygon mirror axle and more proximate to the second wall of the block than the first wall of the block. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification